Pfizer starts late-stage trial of mRNA-based flu vaccineTherapeuticsPfizer Inc said on Wednesday it had started a late-stage U.S. trial of an influenza vaccine involving 25,000 patients, among the first such studies for a messenger RNA flu shot. Read more September 14, 2022/by Reuters Health https://www.pharmalive.com/wp-content/uploads/2022/05/Pfizer-keeps-COVID-sales-forecast-unchanged-as-pandemic-curbs-ease-Reuters-5-3-22.webp 503 960 Reuters Health https://www.pharmalive.com/wp-content/uploads/2020/01/Pharmalive_4c-300x37.png Reuters Health2022-09-14 06:47:542022-09-14 09:21:19Pfizer starts late-stage trial of mRNA-based flu vaccine